comfortandtempur-pedic gohead-to-head with three years' interest-free financing, plus free same-day delivery, setup, and removal of your old set. when brands compete, you save. mattress price wars ends soon at sleep train. ♪ your ticket to a better night's sleep ♪ >>> orcas' intelligence may be superior to man's. as parents they are exemplary, even better than many human beings. and like human being, they have a profound instinct for revenge. presenting "orca." >> if you go back only 35 years, we knew nothing, in fact less than nothing. what the public had was superstition and fear. >> a fight to the death. between the two most dangerous animals on earth. >> these were the vicious killer whales that, you know, had 48 sharp teeth that would rip you to shreds if they got a chance. >> what we learned is that they are amazingly friendly, and understanding and intuitively want to be your companion. >> are you recording this? [ laughter ] >> and to this day there is no record of an orca doing any harm to any human in the wild. ♪ >> they live in these big families, and they have life spans ve

. serta icomfortandtempur-pedic gohead-to-head with three years' interest-free financing, plus free same-day delivery, setup, and removal of your old set. when brands compete, you save. mattress price wars ends soon at sleep train. ♪ your ticket to a better night's sleep ♪ >>> welcome back. who's the most powerful person in the world? according to forbes magazine it is vladimir putin. forbes is out with the list of the 72 most powerful people on the planet. the russian president comes in number one. president obama is at number two this year followed by the leader of china, pope francis, germany's chancellor as well. the rest of the top ten, bill gates, ben bernanke, saudi arabia's king ab abdul, leader of the central bank. >> were you surprised that vladimir putin is number one? >> sells magazines. >> any magazine that does a list i'm always skeptical of. >> it every magazine does a list. >> this what is they call on the internet trawling. that is what they do. trawling. it's preposterous. >> do you think it's preposterous? >> it's also preposterous the pope is at number four.